Apparatus for slaking lime.



No. 773,834. PATENTED NOV. 1, 1904. B. 0. WHITE.

APPARATUS FOR SLAKING LIME.

APPLICATION FILED P113. 6. 1902.

N0 MODEL.

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I "U" "x; I V l H as I a I N Q a F I "j l pg No. 773,834. PATENTED Nov.1, 1904. B. 0. WHITE.

APPARATUS FOR SLAKING LIME.

APPLICATION FILED FEB. 6. 1902.

N0 MODEL. ZSHEETS-SHEET 2.

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Patented November 1, 1904.

UNTTED STATES PATENT Truce.

BRUCE CLARK WHITE, OF PITTSBURG, PENNSYLVANIA.

APPARATUS FOR SLAKING LIIVIE.

' SPECIFICATION forming part of Letters Patent No. 773,834, datedNovember 1, 1904.

Application filed February 6, 1902. Serial No. 92,912.

To (tZZ whom. it may concern.-

Be it known that I, BRUCE CLARK W'HITE, of Pittsburg, in the county ofAllegheny and State of Pennsylvania, have invented certain slaking limeby mixing the same with water.

The machine herein shown as embodying my invention is more especiallyintended to afford a continuous supply of slaked lime and water in asemifluid state or as f milk of lime in readiness for mixture withpulverized ores or concentrates preparatory to pressing the same inmolds to form blocks or bri- 'quets; but a like apparatus may beemployed for preparing lime for making mortar or for other like uses.

The invention consists in the matters hereinafter set forth, and pointedout in the appended claims.

In the accompanying drawings, illustrating my invention, Figure 1 is aplan view of an apparatus embodying the same. Fig. 2 is a centralvertical longitudinal section thereof. Fig. 3 is a cross-section takenon line 3 3 of Fig. 2. Fig. A is a cross-section taken on line 4 4 ofFig. 2. Fig. 5 is a detail longitudinal section showing the maindriving-shaft of the apparatus, showing the driving-pulleys therefor andthe bearing adjacent thereto. Fig. 6 is a detail section taken on line 66 of Fig. 4, showing one of the gates for discharging the material fromone of the mixing-receptacles of the apparatus. Fig. 7 is aface view ofthe valve shown in Fig. 6, the same being a section on line 7 7 of saidfigure. Fig. 8 is adetail section through one of the bearings of one ofthe mixing-shafts. Fig. 9 is a detail section taken on line 9 9 of Fig.8, showing the parts of the bearing in elevation. Fig. 10 is a detailsection of the joint between one of the cast-metal end walls and thesheet-metal shell of one of the receptacles.

The apparatus is herein shown as of double (No model.)

construction, the same embracing two separate tanks, compartments, ormixing-receptacles A A and an intermediate receiving compartment orchamber A, into which the contents of both the exterior or endcompartments may be discharged. Said exterior compartments consist eachof two end walls-namely, an outer wall B and an inner wall Bwhich aremade of cast metal, and sheet-metal shells B B which extend between andare connected at their end margins with'the end .walls B B, said endwalls B B at their inner ends of the receptacles forming the walls ofthe intermediate chamber A, the sides and bottom of which are formed bya wall A which is cast integral'with the inner end walls B B.

The bottoms of the two compartments or receptacles A A are concave orsemicylindric, and extending longitudinally through each receptacle is ahorizontal shaft D, provided with radial stirring-arms E. Said shaftsextend at their ends through and are supported by bearings attached tothe end walls B B of the two compartments or receptacles.

One feature of my invention embraces the construction by which thesheet-metal intermediate parts or shells B of the receptacles are joinedor connected with the cast-metal end walls B B thereof. Said cast-metalend walls are provided each on its inner face with a marginalinwardly-facing groove 6, into which the end margin of the adjacent endof the shell B extends, and the end walls B B at opposite ends of thesaid shells are connected with each other by means oflongitudinallyarranged tie-bolts F, which extend throughoutwardly-projecting lugs I) on the margins of the end walls. The groove5 is made considerably wider than the edge of the shell B so that itwill freely receive'the edge of said shell even though the same be roughor unfinished or more or less irregular, as would be the case where theshell is made by bending a piece of sheet metal as received from themakers and without the same being accurately finished. To make a tightjoint between the walls of said groove 6 and the edge of the sheet-metal shell, the groove 6 is filled at either side of the shell witha filling or packing b of lead or other easily-fusible metal orcompound, which may be packed or hammered into the groove after beingrun therein in a molten state. In placing the parts together the ends ofthe shell will be inserted in the grooves of the cast-metal heads andthe tierods F then inserted, and by means of the nuts f on the ends ofthe tie-rods the end walls will be drawn toward each other, so as tobring the ends of the shell firmly against the bottom of the grooves.The metal packing will then be inserted in the grooves at the sides ofthe shell. The construction described affords a strong and rigidconnection of the parts, by which stiffness and rigidity is given to thestructure as a whole and perfectly water-tight joints are formed betweenthe heads and the shell. An advantage of this construction is that itenables the receptacles to be cheaply constructed with little labor andwithout any tool-finishing either of the heads or the shelhso that thereceptacles may be cheaply constructed.

As a means of attaching the stirrer-arms E to the shafts D said shaftsin their parts between the end walls of the receptacles are made squarein cross-sectional form, and the said arms E are provided with hubs 0,having square apertures adapted to receive'the square portion of theshaft. Said arms E and their hubs are all alike, and the arms arearranged to project in four different directions from the shaft byarranging them suitably upon the shaft. Said shafts are supported attheir ends in the end walls B and B by means of bearings G, which aresecured to the said en d walls and serve to close the openings formed inthe end walls for the passage of the shaft. For this purpose the hubsare provided with circular outwardly-extending flanges g, which overlapthe adjacent edges of the end walls and are secured thereto by means ofbolts H, extending through the overlapping parts of the end walls andthe said flanges. Provision for the adjustment of said bearings so thatthey may be brought accurately in line with the shaft is made by makingthe contact-surfaces of the flanges g convex and those of said end wallsconcave, thereby making the joints between the said flanges and the endwalls in the nature of ball-and-socket joints, the boltholes for theboltsH in the flanges gbeing made slightly larger than the bolts toadmit of the necessary shifting of the bearings with respect to the endwalls in adjusting the-same. By making provision for angular adjustmentof the said bearings with respect to the end walls I am enabled to bringsaid bearings accurately in line with the shafts and to thereby insureeXact fit of the shafts within said bearings notwithstanding that thesaid end walls may not be accurately located with respect to each other,it being obvious that receptacles made for the purpose described will beof somewhat heavy and rough construction in order that they may becheaply made and that by providing adjustment for the bearings in themanner described accurate work in the construction of the receptaclesthemselves is rendered unnecessary. In assembling the parts if thebearings are found to be not accurately in line with the shafts saidbearings can be readily adjusted to the shafts and the bolts holdingthem in place then tightened to form water-tight joints between thebearings and the end walls.

In order to provide water-tight joints between the shafts and thebearings G on the outer end walls B, packing-joints, Figs. 8 and 9, areprovided, consisting of glands E, surrounding the shafts inside of thebearings and secured to said bearings by means of bolts g, havingscrew-threaded engagement with the bearings and provided with nuts bywhich the glands may be drawn toward the bearings. Said glands are shownas provided with recesses to contain packing material, into whichrecesses the cylindric ends of the bearings enter, as is common in suchdevices.

For driving the shafts D D the same are provided outside of the heads Bwith sprocket-wheels I, and a driving-shaft J is arranged longitudinallyabove the top of the receptacle and is provided at its ends withsprocketwheels 1', over which are trained chain belts I, which engagethe sprocketwheels I. Said counter-shaft J is shown as mounted at itsends in bearings K K, attached to horizontal flanges on the upper edgesof the end walls B B, and at its center in a bearing K, attached to thehorizontal flange or web 5, Fig. 1, which is cast integral with theupper margins of the intermediate end walls B B and with the part Awhich connects the same.

The two compartments A A of the machine are intended to be used inalternation, the slaked lime being drawn from one compartment, and inorder to enable the shaft and stirring-arms in one compartment to bedriven while those in the toher are disconnected from the drivingdevices I employ separate driving devices for the two shafts, asfollows: The sprocket-wheel7' at one end of the machine is not directlyattached to the shaft J, but is secured to a sleeve L, which surroundsthe shaft outside of the bearing K, as clearly shown. in Fig. 5.Attached to said sleeve L is a belt-pulley M, and on that shaft,adjacent to and outside of the same, is a loose pulley or idler M, towhich the driving-belt maybe shifted from the pulley M when it isdesired to disconnect the sleeve L and the mixing-shaft driven therebyfrom the driving power. On the said shaft J, outside of the fast andloose pulleys M and M, are located two other'pulleys, N and N. Thepulley N is rigidly affixed to the shaft, and the pulley N is free toturn thereon, so that by shifting the belt from the pulley N to theidler N the shaft J may be disconnected from the driving deformed in theintermediate end wall B near vices. By the use of these devices theshaft D at either side of the machine may be started into or thrown outof operation at any time at the will of the operator.

Provision is made for the delivery of the slaked lime from eithercompartment A to the intermediate compartment A, consisting ofdischarge-openings O, Figs. 2, 4, 6, and 7,

the lower margin of the same. For opening and closing saiddischarge-opening a valve is provided, which consists, as herein shown,of a valve-plate P, connected with the wall B by means of a pivot-stud pon the wall engaging a lug or projection 12, which extends outwardlyfrom one side of the valve-plate. Said stud supports the valve-plate insuch manner that it may swing in a vertical plane and serves to hold thesaid plate in contact with an annular raised seat 0, Fig. 6, formedaround the margin of said opening. The valve-plate is located at theside of the wall B adjacent to the receptacle A, so that the pressure ofthe liquid in the receptacle tends to keep the valve-plate against itsseat. For actuating the valve P an actuating-rod Q is pivoted to theouter face of said valve-plate, at a point some distance from the pivotthereof, the said rod extending upward to the open top of the receptacleand being provided with a handle by which it can be moved endwise foropening and closing the valve.

The casting forming the central compartment A is provided in its bottomwith a discharge-opening B adapted for the attachment of thesuction-pipe of a pump or a delivery-pipe by which the material isconducted away from the machine to the point where the material is used.

In the lower part of each of the compartments A is located a transverseperforated partition or screen R, the same being arranged parallel withand a short distance from the inner end wall B of said compartment. Thepurpose of said perforated partition or screen is to prevent the passageto the discharge-opening O of stones, unslakecl pieces of lime, or otherinsoluble material which may be delivered to the receptacles with thelime.

In connection with the perforated screen or partition R in eachcompartment A, I provide on the end of the shaft D adjacent to thepartition B a stirrer-arm E which is so arranged that it will passbetween the said partition and the end wall B, the purpose of thisconstruction being to insure that the liquid slaked lime which fills thespace between the partition and the said end wall shall be keptconstantly stirred up .or agitated until delivered to thedischarge-opening 0, it being obvious that in the absence of suchstirrerarm operating in the space referred to the slaked lime withinsaid space would remain quiescent during the action of the stirrerarmsupon the material in the main part of the compartment, so that the limein such space would be liable to become solidified or accumulated in thebottom thereof. By keeping said fluid lime in said space constantlystirred up through the action of the stirrerarm referred to the lime iekept constantly in condition for discharge through said opening 0.

In the operation of the apparatus described the lime to be slaked,together with a suitable quantity of water, is delivered to thereceptacles A A, and through the turning of the shafts D and thestirrer-arms E thereon the lime is thoroughly mixed with the water, soas to make what is known as milk of lime.

When the lime in one of the compartments is suitably slaked and mixed,the dischargeopening 0 of that compartment is opened and the fluid inthe receptacle will be discharged therefrom through the centralcompartment A and its opening B The two compartments are intended to beused in alternation, so that a constant supply of the milk of lime maybe provided, as would be required, for instance, when the lime is usedas a binding material for making blocks or briquets from pulverized oresor concentrates, the lime in such case being delivered to a mixingdevice, wherein it is continuously mixed with the material to be pressedinto blocks or briquets, I and carried from said mixing device to thepress or molding machine. In such case the mixing and slaking operationwill be carried on in one compartment while the slaked lime is beingwithdrawn from the other one, so that a continuous supply will beprovided by the machine.

I claim as my invention 1. A machine for slaking lime comprising two endcompartments and an intermediate compartment, the same consisting of twoexterior end .walls, two intermediate end walls which are cast integralwith each other and form the intermediate compartment of the receptacle,and sheet-metal shells interposed between and connected at their endmargins with said exterior and intermediate end walls.

2. A machine for slaking lime comprising a receptacle provided with endwalls, a rotative shaft extending endwise through said re-, ceptacle andprovided with stirring-arms, said end walls having openings for theshaft, and bearings for the shaft which are attached to the end wallsand close the openings in the same; the end walls and bearings havingconvex and concave contact-surfaces whereby said bearings may beadjusted to bring them into alinement with the shaft.

3. A lime-slaking machine comprising two connected receptacles, shaftswithin said receptacles provided with stirring-arms, a driving-shaftmounted on the receptacles and extending longitudinally thereof, gearingconnecting one end of said driving-shaft with one of the stirrer-shafts,a sleeve adapted to my inventionI afiiX my signature, in presence turnfreely on the opposite end of said drivof two Witnesses, this 4th day ofFebruary, ing-shaft, gearing connecting said sleeve With A. D. 1902.

the other of said stirrer-shafts, and driving BRUCE CLARK WVHITE. 5means for separately actuating said driving- Witnesses:

shaft and the said sleeve. 0. CLARENCE POOLE,

In testimony that I claim the foregoing as VVILLIAM L. HALL.

